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Prev Professional Automotive Repair Technical Discussions for May 20, 2004
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Open Help Requests for GM
Help Request Answers
1995 Buick Park Avenue 3.8L Stall VIN: 1G4CW52K3S
This one will stall on the first three decellerations from 30 mph only after a 20 minute hot soak. From then on it has no problems until the next hot soak. IAC was bad initially, but obviously was not part of the stall.
2002 Buick Rendezvous CX 3.4L suspension? VIN: 3G5DA03E42
This vehicle had a noticeable clunk/pop/knocking noise in the front end of the vehicle. It is a single noise, not a succession of noises. It happens at various times at low speeds. It will happen when turning, forward & reverse, sometimes when braking and some...
1988 Cadillac DeVille 4.5L master /accum. combo VIN: 1G6CD515XJ
Red brake light is on and car has no power can hear the pump hum when the keys is turned on. but system dosnt build pressure.
1991 Cadillac Fleetwood 4.9L Cuts out, MIL Lamp on VIN: 1GEDZ90B2M
the problem is that sometimes when the car is started or just driving the a/c control cluster goes off and just a light with c stays on on the a/c cluster and on the fuel gage. the service engine light comes on and set code e047. the only way to turn off is to... Trouble codes: E047
1997 Cadillac Catera 3.0L engine VIN: W06VR54R7V
Looking for some Catera experts out there. I have this car that is leaking a very large amount of oil from somewhere up high at the rear of the engine. I cannot see where it is coming from, short of tearing the upper intake off plus alot more in able to see ...
1973 Chevrolet monte carlo 350CID Air conditioning VIN: 1H57H31632
Hello, I am wondering if any one has a wiring diagram for this old monte carlo. I am looking for one for the air conditioning and for the charging sys. you could email me at [...] Thanks Craig
1991 Chevrolet Lumina Z34 3.4L 3-4 shift VIN: 2GIWPI4X4M
The A solenoid is cylceing off and on. sending voltage and ground through the same wire.
1993 Chevrolet K2500 Cheyenne 6.5L No Start VIN: 1GCGK24F1P
I have a question for all the diesel techs...I'm sure this has been covered in the archives, but I can not access them. We have this '93 truck with the 6.5 turbo that will not start after a hot soak of approx 15-30 minuets of driving on hot days. When the weat...
1996 Chevrolet Caprice Classic 5.7L line pressur VIN: 1G1BL52P8T
Howdy tranny people! I have this beast back again, for harsh engagement, now it is venting fluid out the vent and the fluid is turning dark. The line pressure is too high, It goes from 120 at idle cold in neutral to 275 on snap throttle. Warm, the pressure is ...
1997 Chevrolet Malibu 3.1L Poor Idle Quality, Misfire VIN: 1G1ND52M2V
This Malibu is causing my entire shop to have a headache! This vehicle has a mysterous random misfire code, but cyl #1 is the domenant misfire. Does not feel like an ignition misfire but to eliminate the obvious I did the following: 1)Switched #1 and #6 plug,2... Trouble codes: P0300 (Random cylinder misfire detected)
1998 Chevrolet C1500 Suburban 5.7L engine VIN: 3GNEC16R0W
1998 Chevrolet K1500 Cheyenne 5.7L brake lights VIN: 1GCEK19R6W
have a 98 k1500. brake lights work when you start to press pedal, about a quarter of the way through the stroke, the lights go out. If i just push the brake pedal down a bit, i can keep the lights on as long as i want, but as soon as i pass that point, they qu...
2000 Chevrolet Tracker 2.0L oil leak VIN: 2CNBJ13C0Y
After replacement of the rear main seal and block plug seal in back of block including crank sensor oring engine still has considerable oil leak between trans and engine. Looked very close 2nd time trans was apart not sure what the problem is or what I may be ...
2001 Chevrolet S10 4.3L Cuts out, Misfire, MIL Lamp on VIN: 1GCCS19W91
AAHHHHHH! I inherited this one due to my internet connections (i.e. you guys). Customer went to Meineke with a intermittent misfire problem. Cruising at highway speeds intermittantly the truck will misfire and set the MIL. Meineke did a complete tune-up and a ... Trouble codes: P0300
2002 Chevrolet Suburban 1500 LS 5.3L Misfire, MIL Lamp on VIN: 3GNFK16Z22
This engine misfires on the even # bank only. Misfire counts are extremely high. the odd # bank is fine. The engine idles ok. The misfires happen when throttle is slightly depreseed begining about 1000 rpm. the truck will not run much over 35mph. Injector pres... Trouble codes: P0300
1992 Oldsmobile Cutlass Cruiser S 3.3L Cuts out VIN: 1G3AL54N2N
Car came in from another shop. They installed a used ignition module and coil pack. Car starts fine but when it hits 220 degrees it shuts off, if you wait 10 minutes it starts right back up until it gets to 220 again. We loose spark but not injectors. We scope...
1998 Oldsmobile Intrigue GL 3.8L No Start VIN: 1G3WS52K7W
This car does not start I believe because the spark is extremely weak. (still no start with starting fluid) I tried a new ignition module from Checker. I think that the new module was defective because I lost everything, injector noid light, and rpm at scanner...
1999 Pontiac Grand Am GT 3.4L Cuts out, Stall, Trac off light on VIN: 1G2NW52E9X
Need some HELP here. This little gem the trac off light will come on and the engine will flucuate then stall. it will start up chug and clear out then run fine. This can happen at any time. I hope that someone has run into this before. thanks Bill
2000 Pontiac Sunfire GT 2.4L Valvetrain? VIN: 1G2JD12T6Y
Hello All, Matt Here, This is not actually in my shop, as I run a parts wholesale wharehouse. My neighbors car developed a knock in the top end, right about the time to oil light came on. The oil was over two quarts low. Initial inspection, the noise seems to ...

Fixes & Summaries for GM
Fix/Summary Answers
1988 Buick Skylark Custom 3.0L Excessive Emissions, Poor Idle Quality, Misfire VIN: 1G4NJ14L0J
Thank you to all that repled, Ron, Ty, Keith, Thomas, Alan. My puzzelment about the firing order is somewhat mollified by your input and me setting aside my anal instincts, i.e. I accepted what was in front of me. Moving on to the high emmissions and poor perf...
1996 Buick Regal Custom 3.1L MIL Lamp on VIN: 2G4WB52M9T
Thanks a lot The following is the post from Ron [...]: if misfires on the counter are running up quickly and to a number in the thousands then a fuel problem probably exists in the form of a vacuum leak or bad injector. we have had several 3.1 gm cars in... Trouble codes: P0306 (cylinder 6 misfire).
1989 Cadillac DeVille 4.5L Excessive Emissions VIN: 1G6CD5153K
Hi guys and thanh you for al your help.sorry it took so long to get back.But the owner of the car took it to a to see if thy can fix it .after a week he came back. the dealer told him it needed a new ecm.he told to go for it .after thay told him h...
1992 Cadillac DeVille 4.9L engine hot VIN: 1G6CD13B7N
Well thanks to all of you that responded. Everyone said that these 4.9L engines are notorious for main bearing noise and it is pretty much normal. I informed customer of these responses and he has decided to live with it. Thanks again!
1994 Cadillac DeVille Concours 4.6L alternator VIN: 1G6KF52Y6R
When my technician removed the defective alternator, he had broken the connector plug. The replacement plug from the dealer had four wires, and only one wire from the PCM that went to the L feed which was the turn on input is used. Because the plug was broken ...
1989 Chevrolet V1500 Suburban Silverado 5.7L Steering VIN: 1GNEV16K9K
Thanks to everyone who replied to my request for help. Some of the items I had already looked at, but I went back over everything again. One major problem with this type of suspension (open ball joint , 4 wheel drive) is there is no factory provided adjustment...
1989 Chevrolet S10 Blazer 4.3L Poor Idle Quality, Intermittent MIL VIN: 1GKDT13269
Thank you to all who replied. The customer wants to wait until it acts up more often as it only does it cold and not every time. He will bring it back when it gets worse. As most of you know we can have it a week and it won't act up, the customer can take it a... Trouble codes: 33 (Map sensor).
1995 Chevrolet Camaro 3.4L code 38 VIN: 2G1FP22S9S
thanks to those who responded. don, dale paul & john to name several. most suggested checking the abs motor for gears that might have fallen off. unfortunetly the customer was unwillling to spend the money to repair the problem i wanted to tear into it, but no...
1996 Chevrolet K1500 Cheyenne 5.7L No Start VIN: 2GCEK19R7T
Thanks a big bunch for all that replied and to those who scratched along. While studying GM's wiring scmematic and zooming in on the coil internals it seemed to me that there should be no resistance between the tach and the (-),some resistance should appear fr...
1996 Chevrolet Corvette 5.7L 2-3 Shift / OD VIN: 1G1YY32P0T
Well its done. I Rebuilt the transmission after most of you suspected the Sun Gear assy. GM had a problem with these. The seal failure causes the 3-4 bands to lose pressure and then become unable to maintain engagment. My customers poor maintainance is flat ou...
1999 Chevrolet Lumina 3.1L MIL Lamp on, BOGS OR SLIPPAGE VIN: 2G1WL52MX9
Thanks to everyone that answered. We replaced the VSS and the connector as most recomended. The customer has been through several rain storms and no more problem. Thanks for all your help. Trouble codes: P0502 (vss signal low).
1999 Chevrolet Malibu 2.4L A/C control head/compressor VIN: 1G1ND52T9X
Thanks to everyone who replied. The responses ranged from yes, another bum control head to a possible weak freon charge or ecm shutdown of a/c due to high engine temp. The problem was extremely intermittent, but the other day, it happened quite a bit. I gave t...
2000 Chevrolet Silverado 1500 5.3L front seal VIN: 1GCEK19T9Y
Howdy everyone, I deeply appreciate the 3 guys who responded, Ron Miller told me about a tool Kent Moore makes but without the part# they were unable to look it up for me even though thier catalog is indexed by application. RJ [...] told I would be able to ca...
1997 GMC K3500 Sierra SL 7.4L MIL Lamp on VIN: 1GDJK34JSV
Well the customer is off to the dealer he was in to big a hurry to let us find the problem. With only 3 responses I figured this was a stumper.
1995 Pontiac Grand Am GT 2.3L No Start VIN: 1G2NW15D6S
thanks to michael [...] for information that helped me. his comment did not fix car but got me away from staring at my scanner for rpm readings while cranking. this vehicle wont show rpm while cranking. i thought i saw it for a few seconds but must have been mi...
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